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Note Stockholders' equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 28, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Mar. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 23, 2019
Stockholders Equity Note |  |  |  |  |  |  |  |  |  |
Puerto Rico Laws Restrictions On Banks Net Income |  |  |  |  |  |  | a minimum of 10% of BPPR’s net income |  |  |
Equity Restrictions |  |  | $ 599,000 |  |  | $ 513,000 | $ 599,000 | $ 540,000 | $ 513,000 |
Transfers To Statutory Reserve |  |  |  |  |  |  | $ 0 | $ 0 | $ 0 |
Common Stock, Dividends, Per Share, Cash Paid |  |  |  |  |  |  | $ 1 | $ 1 | $ 0.6 |
Dividends, Common Stock, Cash |  |  |  |  |  |  | $ 101,293 | $ 102,136 | $ 62,234 |
Dividends Payable |  |  | 25,100 |  |  | $ 15,600 | $ 25,100 | 25,500 | 15,600 |
Dividend payable, to be paid date |  |  |  |  |  |  | Jan. 02, 2019 |  |  |
Dividends payable, record date |  |  |  |  |  |  | Dec. 05, 2018 |  |  |
Initial shares received as part of an accelerated share repurchase program |  |  |  | 2,000,000 |  |  |  |  |  |
Common stock purchases |  |  |  |  |  |  | $ 127,465 | 77,420 | 2,202 |
Accelerated share repurchases settlement receipt |  |  | $ 125,000 |  |  |  | 125,000 |  |  |
Preferred stock, cash dividend |  |  |  |  |  |  | $ 3,723 | $ 3,723 | 3,723 |
Preferred stock, shares outstanding |  |  | 2,006,391 |  |  |  | 2,006,391 | 2,006,391 |  |
Common stock shares outstanding |  |  | 99,942,845 |  |  |  | 99,942,845 | 102,068,981 |  |
Common Shares Repurchased Accelerated Share Repurchase Agreements |  |  | 438,180 |  |  |  |  |  |  |
Accelerated share repurchases price paid per share |  |  | $ 51.27 |  |  |  |  |  |  |
Preferred stock, shares authorized |  |  | 30,000,000 |  |  |  | 30,000,000 | 30,000,000 |  |
Dividends Declared per Common Share |  |  | $ 0.25 |  | $ 0.25 | $ 0.15 |  |  |  |
Treasury Stock |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note |  |  |  |  |  |  |  |  |  |
Common stock purchases |  |  |  |  |  |  | $ 127,379 | $ 81,938 | 2,202 |
Surplus |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note |  |  |  |  |  |  |  |  |  |
Transfers To Statutory Reserve |  |  |  |  |  |  | 58,340 | 27,135 | 18,384 |
Common stock purchases |  |  |  |  |  |  | $ 86 | (4,518) |  |
Subsequent event |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program Authorized Amount |  |  |  |  |  |  |  |  |  | $ 250,000
Dividend payable, to be paid date | Apr. 01, 2019 |  |  |  |  |  |  |  |  |
Dividends payable, record date | Mar. 08, 2019 |  |  |  |  |  |  |  |  |
Dividends Declared per Common Share | $ 0.3 | $ 0.3 |  |  |  |  |  |  |  |
Accelerate Share Repurchase [Member] |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program Authorized Amount |  |  |  |  | $ 75,000 |  |  |  |  |
Accelerated Share Repurchase Program Adjustment |  |  |  |  | 4,500 |  |  |  |  |
Common stock purchases |  |  |  |  | $ 79,500 |  |  |  |  |
Stock Repurchased During Period Shares |  |  |  |  | 1,847,372 |  |  |  |  |
Accelerate Share Repurchase [Member] | Subsequent event |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program Authorized Amount | $ 250,000 |  |  |  |  |  |  |  |  |
Accelerate Share Repurchase [Member] | Subsequent event | Treasury Stock |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note |  |  |  |  |  |  |  |  |  |
Common stock purchases | 200,000 |  |  |  |  |  |  |  |  |
Accelerate Share Repurchase [Member] | Subsequent event | Surplus |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note |  |  |  |  |  |  |  |  |  |
Common stock purchases | $ 50,000 |  |  |  |  |  |  |  |  |
Series A Preferred Stock |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note |  |  |  |  |  |  |  |  |  |
Preferred Stock, Redemption Price Per Share |  |  | 25 |  |  |  | $ 25 |  |  |
Preferred Stock, Liquidation Preference Per Share |  |  | $ 25 |  |  |  | 25 |  |  |
Preferred Stock, Dividends, Per Share, Cash Paid |  |  |  |  |  |  | $ 0.1328125 |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  |  |  |  | 6.375% |  |  |
Preferred stock, cash dividend |  |  |  |  |  |  | $ 1,400 | 1,400 | 1,400 |
Dividend preferred stock cash paid |  |  | $ 1,400 |  |  | $ 1,400 | $ 1,400 | $ 1,400 | $ 1,400 |
Preferred stock, shares outstanding |  |  | 885,726 |  |  | 885,726 | 885,726 | 885,726 | 885,726 |
Series B Preferred Stock |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note |  |  |  |  |  |  |  |  |  |
Preferred Stock, Redemption Price Per Share |  |  | $ 25 |  |  |  | $ 25 |  |  |
Preferred Stock, Liquidation Preference Per Share |  |  | $ 25 |  |  |  | 25 |  |  |
Preferred Stock, Dividends, Per Share, Cash Paid |  |  |  |  |  |  | $ 0.171875 |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  |  |  |  | 8.25% |  |  |
Preferred stock, cash dividend |  |  |  |  |  |  | $ 2,300 | $ 2,300 | $ 2,300 |
Dividend preferred stock cash paid |  |  | $ 2,300 |  |  | $ 2,300 | $ 2,300 | $ 2,300 | $ 2,300 |
Preferred stock, shares outstanding |  |  | 1,120,665 |  |  | 1,120,665 | 1,120,665 | 1,120,665 | 1,120,665 |

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- Definition The minimum amount of the net income of banks in Puerto Rico to be transferred to a reserve fund until such fund equals the total of paid-in-capital on common and preferred stock. Any losses incurred by the bank must first be charged to retained earnings and then to the reserve fund. Amounts credited to the reserve fund may not be used to pay dividends without the prior consent of local regulators. The failure to maintain sufficient statutory reserves would preclude BPPR from paying dividends. + References No definition available. + Details
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